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amaranthelk607Lv1

28 Sep 2019

Explain the process by which a single microscopic bacteriophage can produce a plaque in a lawn of bacteria that is visible to the naked eye: infection, replication etc. (6 marks)

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Nelly StrackeLv2

28 Sep 2019

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BIOL_101_BASIC MEDICAL TERMINOLOGY

Chapter 3 you can fine the book here in this link http://docdro.id/1bQwHKr

Which of the following organisms are categorized as Macro organisms:

a- Human beings

b-Fungi

c-Bacteria

d-Algae

4. can be caused by inhaling fungal spores deposited in the feces of infected birds.

a-Malaria

b-Primary acute histoplasmosis

c-Asthma

d-Red blood cell rupture

9. Which of the following is a bacteria :

a. Amoeba

b. HIV

c. Staphylococcus

d. Yeast

10. Modern terminology for animalcules is:

a. Bacteria

b. Protozoa

c. Virus

d. Fungi

12. Biology means:

a-Study of organisms

b-Study of life

c-Study of Plants

d-Study of diseases.

13. is a nonliving super chemical that is a parasite of living cells:

a-Amoeba

b-HIV(Human immunodeficiency virus)

c-Roundworms

d-Larvae

14. Fungal infection refers to :

a-attack by large, grossly visible multicellular fungi

b-attack by yeast cells that are microscopic parasites

c-abnormal condition caused by a parasitic fungus.

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beigeherring414

QUESTION 1: The rabies virus primarily affects the nervous system. The specificity that the rabies virus has for neuronal host cells is primarily dictated by __________________________.

A. the helical shape of its viral capsid

B. the type of nucleic acid used for its viral genome (single-stranded, antisense RNA)

C. the spikes that protrude from its viral envelope

D. the segmented nature of its viral genome

QUESTION 2: Which of the following genome types has been observed in viruses? To be marked correct, you'll need to select all true statements, as there may be more than one correct answer.

A. Single-stranded RNA

B. Single-stranded DNA

C. Double-stranded RNA

D. Protein-based

QUESTION 3: Choose the correct statement about viral evolution.

A. RNA and DNA viral genomes evolve at equal rates.

B. Cellular genomes mutate at a faster rate than viral genomes due to their large size and increased chance of replicative mistakes.

C. DNA viruses mutate faster than RNA viruses because thymine is more susceptible to mutation than uracil.

D. RNA viruses mutate faster than DNA viruses due to a lack of proofreading replicative enzymes.

QUESTION 4: Your elderly patient is affected by shingles. After careful observation, you note that the virus responsible for the infection has an icosahedral capsid, is enveloped, and has double-stranded linear DNA as its genetic material. Based on this information, in which of the following viral families would you group this viral pathogen?

QUESTION 5: Which of the following is a key difference between lytic and lysogenic bacteriophage replication cycles?

A. Lysogenic bacteriophages release via host cell lysis, whereas lytic bacteriophages bud off from the host cell membrane.

B. The lytic replication cycle ends with host cell lysis and release of newly formed bacteriophage particles, whereas lysogenic replication leads to prophage formation.

C. Lytic replication requires an uncoating step, whereas in lysogenic replication, the bacteriophage's nucleic acid is directly injected into the host cell.

D. Whereas lytic replication enables the infection of several hosts, lysogenic replication only allows for infection of a single host cell.

QUESTION 6: Which of the following is an unsuitable culture method for an animal virus?

A. Direct inoculation of virus onto blood agar

B. Live animal inoculation

C. Tissue culture method

D. Injection of virus into embryonated eggs

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c. [Heat and temperature mean the same thing - the transfer ofthermal energy]

2. What is "internal kinetic energy"?
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b. [Moving energy that you can see with the naked eye (akamacroscopic)]
c. [All forms of energy]

3. What is "internal potential energy"?
a. [Stored energy that you cannot see with the naked eye (akamicroscopic)]
b. [Stored energy that you can see with the naked eye (akamacroscopic)]
c. [All forms of energy]

4. What the difference is between "thermal energy" and"heat"?
a. [Thermal energy and heat mean the same thing. There is nodifference between them.]
b. [Heat results from thermal energy by either a change in phase ora difference in temperature.]
c. [Thermal energy results from heat either by a change in phase ora difference in temperature.]

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b. [Negatively charged]
c. [Neutrally charged]

6. The solid state of ice is less dense than its liquidstate.
a. [True] b. [False]

7. Concrete has a higher heat capacity than water.
a. [True] b. [False]

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